Discover the remarkable SLZ end suction pump: a long-coupled, single-stage centrifugal chemical process pump that stands as a beacon of excellence. Standardized to the high benchmarks of EN 22858 / ISO 2858, it caters to a vast realm of applications across industrial and marine landscapes. Engineered for the effortless transit of low-viscosity clean or slightly contaminated fluids, it efficiently handles fresh water, sea water, and fuels such as diesel, petrol, and kerosene. Its versatile applications span fuel transfer, chemical processing, energy plants, mining, fire fighting, irrigation, water supply and treatment, pressurization, grey water management, dewatering, and marine operations.
Introducing an exceptional heavy-duty centrifugal chemical process pump, designed for high flow and high-pressure conditions. It rises to meet challenging demands with unwavering reliability and performance excellence.
The long-coupled centrifugal chemical process pump design offers a plethora of benefits that enhance operational efficiency and maintenance simplicity.
The ingenious long-coupled configuration provides effortless maintenance accessibility, enabling easy pump head access without removing the motor—a testament to superior design.
Engineered for robustness and relentless performance, this process pump is fortified with additional bearings in the pump head, minimizing motor strain during operation and ensuring uninterrupted functionality.
Thanks to the innovative back pull-out design, the pump allows the motor to be removed while keeping the pump connected to the pipework, significantly reducing service and maintenance time—enhancing productivity.
The pump and motor boast independent shafts, ensuring that only the pump shaft requires replacement if compromised. Unlike less durable models that rely on motor shafts, this design prevents costly motor replacements.
Featuring a long-coupled design, it strategically separates the motor and pump, shielding the motor from fluid exposure in the event of a seal failure, thus ensuring long-term reliability.
Product Summary
• Efficiently pumps a diverse array of clean, low-viscosity, or slightly contaminated fluids.
• Customizable with closed or semi-open impeller options to suit diverse needs.
• Back pull-out design streamlines maintenance, making it quick and effortless.
• Handles fluids up to a maximum temperature of 175°C, ensuring adaptability.
• Heavy-duty shaft design ensures it remains unexposed to fluid.
• External seal cooling system available for enhanced operational stability.
• Independent pump and motor shafts underscore reliability and ease of maintenance.
• Crafted from an array of materials including cast iron, 316 stainless steel, duplex stainless steel, bronze, with bespoke options available.
• Suction and discharge flanges meet EN 1092-2 / PN 16 standards. Options for EN 1092-1 / PN 16 for diverse steel casings are available.
• Gland packing, single, double, and cartridge mechanical seal options are available to meet varied sealing needs.
• Equipped with three-phase 50hz / 60hz motors, with IP55 rating as standard for robust performance.
• ATEX-compliant version available upon request for environments with explosive atmospheres.
• Independent certification available upon request, ensuring compliance and quality assurance.
• Manufactured in strict accordance with standard EN 22858 / ISO 2858 for guaranteed quality.
• Engineered for low NPSH, enhancing suction performance.
• Facilitates assembly without the need for alignment, simplifying installation.
• Impellers meticulously balanced to ISO 1940 class 6.3, ensuring optimal performance and reliability.
• Long-coupled design complete with baseplate for stability and ease of installation.
• Optional API seal installation is available, compliant with API682 standards for high-level sealing.
• Oil-lubricated ball bearings contribute to smooth and efficient operation, minimizing wear.
| Pump Type |
Centrifugal |
| Max Flow Rate |
1500M³H |
| Max Head |
160M |
| Max Temp |
175°C |
| Max Viscosity |
200 cst |
| Max Solid Passage |
20mm |
| Self Priming |
N |
| Inlet/Outlet Sizes |
32mm to 250mm |
| Mechanical seal type |
Double mechanical seal, API plan |
| Pump Materials |
AISI304, AISI316, AISI316L, Bronze, Cast Iron, Cast Steel, Ductile Iron, Duplex, NiAl Bronze, Super Duplex |
Our centrifugal and chemical pumps proudly incorporate renowned brand bearings, ensuring exceptional longevity even amidst the harshest conditions. Expect extended service life and reliability that stands the test of time.
To masterfully balance axial thrust, our design features both front and rear wear rings on most impellers, complemented by a precision-engineered balance hole on the back shroud. In specific cases where axial thrust remains minimal, the rear wear ring and balance hole are omitted, optimizing efficiency.
Crafted with high-precision casting, our impellers guarantee superior performance. Available in robust materials such as cast iron, stainless steel, and bronze, they promise reliability and durability.
Our offerings are categorized into two primary groups:
1) "Flush" - This method infuses a clean, cool liquid into the seal chamber, creating an optimal operational environment. A secondary port, typically oriented downward, serves as a vital leakage monitor or vent, ensuring seamless functionality.
2) "Barrier or Buffer" for dual seals - This sophisticated system introduces a secondary fluid between two mechanical seals, preventing air contact with the pumped fluid. It significantly boosts seal cooling and enhances safety, offering unparalleled protection.
A noteworthy point is that not all mechanical seals necessitate specialized external flush setups.
The Ingenious Design of Flexible Couplings
Unlike their rigid counterparts, flexible couplings are engineered to adapt to movement, absorbing vibrations and accommodating thermal expansion effortlessly. This makes them ideal for scenarios with unavoidable misalignment between drive and pump shafts. Beyond their noise-reducing capabilities, their sophisticated design translates into higher upfront costs but ultimately leads to significant maintenance savings by safeguarding shafts and bearings against damage and wear.
Our Semhai API standard chemical pumps integrate API 671 Standard Disc Couplings, embodying industry excellence.
These couplings offer unmatched efficiency with reduced reaction loads and superior balancing quality, elevating the entire pump power transmission to new heights of effectiveness and performance.
| Industry |
Services |
| Chemicals, dyes & intermediates |
Organic/inorganic chemicals |
| Oil extraction & waste oil refineries |
Hydrocarbons/Volatile liquids |
| Bulk drugs & Pharmaceuticals |
Dyes & Intermediates |
| Effluent treatment plants |
Water treatment & distribution system |
| Heating & air conditioning plants |
Thermic fluid/ hot oil |
| Cooling towers |
Corrosive/abbrasive liquids |
Professional Cooperation Agencies: We have forged strategic partnerships with esteemed agencies, amplifying our capabilities and enhancing the quality assurance of our products.
Our company has established enduring cooperative relationships with several prominent domestic pump-testing institutions, underscoring our commitment to excellence and reliability.
National Quality Supervision and Inspection Center of Industrial Pumps (Tiexi District, Shenyang city): A leading authority in pump quality control, ensuring our products meet the highest standards.
Irrigation Machinery Products Quality Inspection Center of Machinery Industrial (Zhenjiang City): A trusted name in quality inspection, validating the performance and durability of our irrigation machinery.
Ministry of Agriculture, Water Pump Quality Supervision and Testing Center (Chongqing city): A key partner in ensuring our water pumps achieve outstanding quality and reliability.
Shanghai Mechanical and Electrical Products Quality Inspection Center (Shanghai city): A pivotal facility in certifying the excellence and precision of our mechanical and electrical solutions.
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